This resonates. There are certain tasks, like dealing with any government or healthcare-related web page, that I won't even bother attempting on my phone. In my case, it's because I just know in my heart of hearts that the crummy mobile website won't be feature-complete enough for me to complete my goal.

My wife is the opposite. It doesn't occur to her that the problem may be with the janky website, not with her. She'll ask me for help with a thing out of frustration and my first troubleshooting step is to reach for my laptop. This is almost inevitably followed by "hey, wait, how come you're able to press the Submit button but I wasn't able to?" "Because the dev never tested this on a phone and it's broken." "So it's not just me being incompetent to use this website?" "Nope, never was."